【发布时间】：2017-02-25 17:40:05
【问题描述】：
我是 Laravel 的新手，我对如何正确配置数据库连接有以下疑问。
我正在使用 Laravel 5.4，我需要连接到现有的 MySql 数据库。所以按照本教程：https://laravel.com/docs/5.4/database
我以这种方式设置了我的 config/database.php 文件：
<?php
return [
/*
|--------------------------------------------------------------------------
| Default Database Connection Name
|--------------------------------------------------------------------------
|
| Here you may specify which of the database connections below you wish
| to use as your default connection for all database work. Of course
| you may use many connections at once using the Database library.
|
*/
//'default' => env('DB_CONNECTION', 'mysql'),
/*
|--------------------------------------------------------------------------
| Database Connections
|--------------------------------------------------------------------------
|
| Here are each of the database connections setup for your application.
| Of course, examples of configuring each database platform that is
| supported by Laravel is shown below to make development simple.
|
|
| All database work in Laravel is done through the PHP PDO facilities
| so make sure you have the driver for your particular database of
| choice installed on your machine before you begin development.
|
*/
'connections' => [
/*
'sqlite' => [
'driver' => 'sqlite',
'database' => env('DB_DATABASE', database_path('database.sqlite')),
'prefix' => '',
],
*/
'mysql' => [
'driver' => 'mysql',
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB_DATABASE', 'pandaok'),
'username' => env('DB_USERNAME', 'root'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'strict' => true,
'engine' => null,
],
/*
'pgsql' => [
'driver' => 'pgsql',
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', '5432'),
'database' => env('DB_DATABASE', 'forge'),
'username' => env('DB_USERNAME', 'forge'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8',
'prefix' => '',
'schema' => 'public',
'sslmode' => 'prefer',
],
*/
],
/*
|--------------------------------------------------------------------------
| Migration Repository Table
|--------------------------------------------------------------------------
|
| This table keeps track of all the migrations that have already run for
| your application. Using this information, we can determine which of
| the migrations on disk haven't actually been run in the database.
|
*/
'migrations' => 'migrations',
/*
|--------------------------------------------------------------------------
| Redis Databases
|--------------------------------------------------------------------------
|
| Redis is an open source, fast, and advanced key-value store that also
| provides a richer set of commands than a typical key-value systems
| such as APC or Memcached. Laravel makes it easy to dig right in.
|
*/
/*
'redis' => [
'client' => 'predis',
'default' => [
'host' => env('REDIS_HOST', '127.0.0.1'),
'password' => env('REDIS_PASSWORD', null),
'port' => env('REDIS_PORT', 6379),
'database' => 0,
],
],
*/
];
正如你在前面的代码中看到的 sn-p 我注释了所有除了与 MySql 相关的设置。
我也评论了这一行：
'default' => env('DB_CONNECTION', 'mysql'),
为了避免它从 .env 文件中获取连接参数，其中包含：
DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=homestead
DB_USERNAME=homestead
DB_PASSWORD=secret
但是这样做时，当我对类执行此查询时，我会收到此错误消息 $resut = DB::select('select * from pm_user where id = ?', [1]);：
ErrorException in DatabaseManager.php line 112:
Undefined index: driver
in DatabaseManager.php line 112
at HandleExceptions->handleError(8, 'Undefined index: driver', 'C:\\xampp\\htdocs\\HotelRegistration\\vendor\\laravel\\framework\\src\\Illuminate\\Database\\DatabaseManager.php', 112, array('name' => null, 'config' => array('mysql' => array('driver' => 'mysql', 'host' => '127.0.0.1', 'port' => '3306', 'database' => 'homestead', 'username' => 'homestead', 'password' => 'secret', 'charset' => 'utf8mb4', 'collation' => 'utf8mb4_unicode_ci', 'prefix' => '', 'strict' => true, 'engine' => null)))) in DatabaseManager.php line 112
at DatabaseManager->makeConnection(null) in DatabaseManager.php line 71
at DatabaseManager->connection() in DatabaseManager.php line 322
at DatabaseManager->__call('select', array('select * from pm_user where id = ?', array(1))) in Facade.php line 221
at DatabaseManager->select('select * from pm_user where id = ?', array(1)) in Facade.php line 221
..............................................................................
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为什么？怎么了？我错过了什么？我该如何解决这个问题？
为什么 Laravel 在 2 个不同的地方（config/database.php 文件和 .env 文件）定义数据库连接参数？
【问题讨论】：
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标签： php laravel laravel-5 laravel-5.4